Boiler cleaner



Jan. 23, 1934. c. L. HowsE Er AL BOILER CLEANER Filed Nov. 3, 1930 4 Sheets-Sheet l i -n d n QN. n. www n fo. c Qn. um.. --.RH n .n........|.. -..www c( un.. .|.nu\%.l mi l l l r fl o x www l I N5 /4 Nn IWW "In n. mw u. mh .wn o n w kw. 0\\ l' QI Nw.

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BOILER CLEANER Filed Nov. 3, 1930 4 Sheets-Sheet 2 lNVENTORs* Kaff/) Hvwse k/)l//i 770,005

ATTORNEY! Jan. 23, 1934. c. HowsE Er Al.

BOILER CLEANER Filed Nov. 3, -1930 4 sheets-sheet s Jan. 23, 1934. c. L. HowsE Er A1.

BOILER CLEANER Filed Nov. 3, 1930 4 Sheets-Shea?l 4 www. #MMM/4mm@ f @bai/N# ATTORNEY:

Patented Jan. 23, 1934 UNiTED 'STATES PATENT ori-'lcs 1,944,324 Boum CLEANER Curtis L. Howse and Willis P. Thomas, Detroit. Mich., assignors to Diamond Power Specialty Corporation, Detroit, Mich., a corporation of Michigan Application November 3, 1930. Serial No. 493,153

13 Claims. (Cl. 122-392) This invention relates to boiler cleaners and reference character 11. The blower element is has particular reference to a boiler cleaner ofthe closed at its distal end, as designated by the refcharacter in which a blower element is adapted erence character 13, and at its other end the to discharge jets of cleaning fluid adjacent the blower .element is connected to a swivel tube 14 portions of the boiler to be cleaned. which projects through `an opening 15 in the @D One of the primary objects of this invention is boiler wall 16 for connection to a blower head to provide a boiler cleaner which will include a designated generally by the reference character blower element movable to a plurality of spaced 17. blowing positions. The blower head includes a casing 18 terminat- The invention further contemplates the pro\ ing at its forward end in a tubular extension 19 65 vision of a boiler cleaner of the above mentioned which projects into a wall box 20 fixed in the character in which the blower element may be opening v in the boiler wall. A plate 2l is promoved from one blowing position to another vided for sealing the opening between the inner without, however, discharging jets of cleaning periphery of the wall box and the outer periphl5 fluid during this movement. ery of the extension 19, this plate serving through 7G The invention further contemplates the prothe spring suspension 22 to aid in yicldably sup- Vision of a blower element which will be mounted porting the blower head from the boiler wall. for rotation and for movement to a plurality of For adjusting the blower head relative to the l spaced blowing positions, together with a single boiler wall there may beprovided a stud 23 enactuating means for electing both the rotation gageable-with the wall box, this stud projecting "5 and the traversing movement of the blower elethrough an opening formed in a lug 24 carried ment. i by the blower head, there being nuts or the like A still further object of the invention is to pro- 25 which threadedly engage the stud and which vide a blower element which is movable to a pluare positioned on opposite sides of the lug 24 to 25 rality of spaced blowing positions and which may hold the same in adjusted position. 80 be rotated through any number of revolutions in The blower element 10 is mounted for rotation each of said blowing positions. whereby the jets oi cleaning uid discharged Other objects and advantages of this invenfrom the nozzles may be directed toward the tion, together with the numerous novel details of different portions of the boiler to be cleaned and construction thereof, will become more apparent this blower element is also mounted for move- 85 as the following description proceeds, particularment from the inner blowing position shown in ly when reference is had to the accompanying solid lines in Figure 1 of the drawing to the outer drawings, wherein: blowing position shown in dotted lines in this Figure l is a sectional View through a boiler figure. For rotating the blower element there is cleaner constructed in accordance with the provided a gear 30 keyed to the tube 14 as at 31 `to teachings of this invention; whereby the tube 14 may move axially relative to Figure 2 is a plan view partly in section of a the gear 30 but is always rotatably connected to portion of the structure shown in Figure 1; the same.- A pinion 32 is arranged to drive the Figure 3 is a sectional view taken substantially gear 3G and this pinion is in turn fixed on a shaft on the line 3 3 of Figure 2; 33 which is driven by a sheave wheel 34 in ac- 95 Figure 4 is a sectional view taken substantially coi-dance with the usual practice. Obviously, a on the line 4-4 of Figure 1; chain or like flexible member 34 may be asso- Figure 5 is a view similar to Figure 1 showing ciated with the sheave 34 to provide means for a slightly modified form of construction; rotating the blower element from a point below Figure 6 is a sectional view taken substantialthe blower head. 100 ly on the line 6-6 of Figure 5; To provide for shuttling or traversing of the Referring then particularly to the drawings blower element from its inner to its outer blowwherein like reference characters designate coring positions, there is provided a tube 35 fixed at responding parts throughout all views, there is its ends within the casing 18. At its one end the shown in Figure l a blower element 10 provided tube 35 is provided with the packing rings 36 105 with a series of like nozzles for directing 'jets of which provide a leak-proof connection between cleaning fluid adjacent portions of the boiler to the tube 35 and the tube 14. The latter tube is be cleaned such, for example, as the boiler tubes arranged to telescopically engage the tube 35 and l2. One of these nozzles is shown in full lines in thus may move longitudinally from the position Fig. l of the drawings and is designated by the shown in solid lines in Figure 1 of the drawing to 11o the position shown in dotted lines in this figure. A thrust bearing 37 is preferably provided for -taking up the axial thrust on the blower element and this thrust bearing may be mounted in a cup- 5 shaped housing 38 provided on its lower side with a rib 39 engaging in a guideway in a plate 40 carried by the inner periphery of the housing or casing 18. For supplying cleaning uid to the blower element there is provided a supply pipe 41 which may be connected to any suitable source of supply of cleaning 'fluid such as air under pressure, or steam. 'Ihis supply pipe discharges into a fitting 42 carried by the blower head, and a valve 43 associated with this fitting provides means for controlling the flow of cleaning iluid from the supply pipe to the tube 35 and thus to the blower element.

The valve 43 is mounted for movement transversely of the flow of cleaning fluid through the blower head and is connected to a piston 44 which is mounted for reciprocation in a cylinder 45. The lower face of the piston is constantly exposed to the pressure of the cleaning fluid in advance of the valve 43 and the arrangement is such that the cleaning fluid may leak past the piston 44 to build up a pressure in the chamber 4B above the piston 44 in the cylinder 45.- 'A spring 47 within the cylinder engages at its one end the piston 44 and at its other end an abutment plate 48 so that when the pressures are equal on the opposite sides of the piston. the spring 47 holds the valve 43 closed.

To open the valve 43 the pressure is exhausted above the piston 44 so that the pressure of the cleaning uid acting on the under face of the piston will move the piston upwardly against the tension of the spring 47. To accomplish this there is provided a port 49 which provides copimunication between the chamber 46 and a chamber 50 formed in a valve casing 51. This valve casing is provided with an exhaust port 52. A valve 53 normally held to its seat by a spring 54 is provided for controlling communication between the exhaust port 52 and the chamber 50. The valve 53 is provided with a stem 54 and this stem is adapted to be actuated by the mechanism about to be described.

Fixed to the gear 30 for rotation with the same. there is provided a cam 60. This cam is arranged to engage the depending arm 61 of a member 62 which is xed to the end of a shaft 63, which shaft is rotatably mounted in suitable bearings carried by the blower head1. It will be noted, by reference to Figure 4 of the drawings, that rotation of the gear 30 in one direction will swing the finger 61 and thus rock the shaft 63 in one direction, while rotation of the gear 30 in the opposite direction will effect a rocking of the shaft 63 in the opposite direction.

Fixed to the end of shaft 63 and adjacent the valve stem 54 is a member 65 provided on its upper and lower faces with the cam surfaces 66 and 67 respectively. Pivotally mounted as at 68 for engagement by the member 65, is a lever 69 which in turn is adapted to engage the valve stem 54 to actuate the same. Thus, upon rocking of the shaft 63 in either direction, the lever 69 will be raised to actuate the valve stem 54 and to thus open the valve 53. Obviously, when the valve 53 is open, the pressure in the chamber 46 above the piston 44 will be exhausted and the valve 43 will be opened by the pressure of the cleaning iiuid acting on the under face of the piston 44. It will be noted that the -cam 60 is ing a portion only of the rotation of the blower designed to effect an opening of the valve 43 durelement so that upon continued rotation of the blower element the valve 43 will be periodically opened and closed and will be held open through only a predetermined arc. The rapidity with which the cleaning uid leaks past the piston 44 will determine the rapidity of the closing movement of the valve 43 so that by properly fitting the piston in the cylinder the valve may be set to operate as quickly as desired.

It will be apparent that if the valve 43 is opened to admit cleaning fluid to the blower element when the latter is in its outer blowing position, the force of the cleaning fluid acting on the Yclosed end of the blower element will move the blower element inwardly of the boiler to the blowing position shown in full lines in Figure 1 of the drawings. For moving the blower element in the opposite direction or to the position shown in dotted lines in Figure l of the drawings, there is provided a pair of pistons 70 mounted in cylinders 71 carried by the blower head. These pistons are provided with piston rods 72 which are connectedto anges 73 formed on the member 38. Thus, if a uid under pressure is admitted to the inner ends of the cylinders 71 or to the right of the pistons 70, as viewed in Figure 2 of the drawings, these pistons will be moved rearwardly in their cylinders and will shift the blower element from its inner to its outer blowing position. It will be noted that the member 38 is fixed against movement longitudinally of the tube 14 by virtue of the shoulder 74 formed on the outer periphery of the tube and the nut 75 which engages the thrust bearing 37. An indicator 76 arranged to project through a slot 77 formed in the housing 18 may be provided to visibly show whether the blower element is in its inner or outer position.

For supplying iluid under pressure to the cylinders 71, there may be provided passages formed in a block 79 forming a part of the head 17. It will be noted by reference to Figure 3 of the drawing that the passages 80 communicate at their one ends with passages 81 winch open into the ends of the cylinders 71 and that they communicate at their other ends with a chamber 82 formed in a valve casing 83. This valve casing is also provided with a chamber 84 which is placed in communication with the cleaning fluid under pressure in the supply pipe by a passage 85 which opens into the cylinder 45 below the piston 44. A valve 86 normally held to its seat by a spring 87 controls communication between the chambers 84 and 82. The valve 86 is provided with a stem 88 which is positioned to be actuated by the member 65, as will be readily apparent by reference to Figure 3 of the drawings.

The operation of the apparatus as thus far described is as follows. If the blower element is in the position shown in dotted lines in Figure 1 of the drawings and the left hand end of chain 35 is pulled to rotate the sheave wheel in a counter-clockwise direction, the gear 30 will be rotated in a clockwise direction and the member 62 will be actuated by the cam 60 to rock the shaft 63 in a counter-clockwise direction as viewed in Fig. 4. This will cause member 65 to rock the lever 69 upwardly, as viewed in Figure 3 of the drawings, and will actuate the valve 53 to exhaust the pressure above the piston 44 and to thus effect an opening of the valve 43. It will be noted that upon rocking of the shaft 63 in this direction the cam 67 will be moved away from the valve stem 88 so/that the valve 86 will not be actuated. Thus. cleaning fluid under pressure will be supplied to the blower element but no fluid under pressure will be supplied to the cylinders 71. As brought out before, the pressure of the cleaning fluid acting on the closed end of the blower element will force the blower element inwardly of the boiler to the blowing position shown in solid lines in Figure l of the drawings. With the blower element in this position, it will be obvious that the sheave wheel may be continuously rotated in a counter-clockwise direction and that the valve 43 will be periodically opened and closed during rotation of the blower element, and cleaning fluid will thus be periodically admitted to the blower element.

If, now, the right hand end of chain 35 is pulled to rotate the sheave wheel in a clockwise direction, the gear 30 will be moved in a counterclockwise direction and the shaft 63 will be rocked in a clockwise direction as viewed in Fig. 4. Rocking of the shaft 63 in this direction will move the cam 67 downwardly, as viewed in Figure 3 of the drawings, so that the valve 86 will first be opened and then the lever 69 will be actuated by the cam 66 to effect an opening of the valve 53. Thus, fluid under pressure will first be supplied to the cylinders 71 to move the pistons 70 lto the left and to move the blower element to its blowing position shown in dotted lines in Figure 1 of' the drawings. Immediately thereafter the valve 43 will be opened andcleaning fluid will be supplied to the blower element but the blower element will not be moved inwardly because of the fact that it will be held in its outer blowing position by the pressure of the fluid acting on the pistons 70. Thus, the sheave wheel 34 may be continuously rotated in a clockwise direction and the blower element will be held in its outer position although cleaning fluid Will be periodically supplied to the blower element for discharge from the nozzles 11. that the invention provides a blower element which is movable to a plurality of spaced blowing positions and which may be continuously rotated in each of said blowing positions. There is provided a single actuating member, namely the chain 35, for effecting either a rotation or a shuttling or traversing of the blower element, and during its movement from the position shown in solid lines in Figure 1 of the drawings to the position shown in dotted lines in Figure 1 of the drawings, no cleaning fluid will be supplied to the blower element. While the blower element is shown as being mounted for movement to only two blowing positions, it will be readily apparent that the blower element might be mounted for movement to more than two spaced blowing positions without departing from the spirit of `the present invention.

In Figures 5 and 6 a slightly modified form o construction is shown. Referring to these figures, it will be noted that there is provided a blower element 10a which projects through an opening 15*i in a boiler wall 16a, this blower element being provided with discharge nozzles (not shown) for directing jets of cleaning fluid adjacent the portions of the boiler to be cleaned. Fixed to the outer end of the blower element is a tube 14B adapted to telescopically engage a tube 35 fixed within the blower head 17a.

A gear 30 is keyed to the tube 14a and this gear is adapted to be driven by a. pinion 32al mounted for rotation with a sheave wheel 34a. A cleaning fluid under pressure is supplied to the tube 35 Thus, it will be apparent and thus to the blower element by a pipe 41, there being provided a valve 43 connected to a piston 44 for controlling the flow of cleaning fluid from the supply pipe to the blower element. 'Ihe construction is such that the valve 43al will be opened by the pressure of thel cleaning fluid acting on the under face of the piston 448L whenever the fluid under pressure is exhausted from the chamber 46EL above the piston.

The above structure is similar to that disclosed in the rst embodiment of the invention and the operation ofthe structure as thus far described will therefore be readily apparent. In this embodiment of the invention," however, there is provided an annular piston 100 for moving the blower element to its outer blowing position. This piston 100 is preferably threaded or otherwise secured to the outer end of the tube' 14 and is mounted for reciprocation in the annular chamber 101 formed between the outer periphery of the tube 35a and the inner periphery of a sleeve 102 carried by the head 17a. A port 103 is provided at the left hand end of the cylinder 101 and this port is controlled by a needle valve 104 to-pro vide for cushioning of the piston 100 on its outbound trip, while a port 105 communicating with a bore 106 in the blower head is provided at the other end of the cylinder to provide for the admission of fluid under pressure to the cylinder to force the piston 100 outwardly.

For controlling the supply of fluid under pressure to the bore 106, there is provided a valve 107 which controls communication between a chamber 108 and a passage 109, which passage is connected to the bore 106. Fluid under pressure is supplied from the supply pipe 41 to the chamber 108 by a conduit 110 while a spring 111 normally holds the valve 107 closed.l

For actuating the valve 107 the latter is provided with a stem 115 adapted to be engaged by the arm 116 of a bell crank lever 117 which is rotatably mounted on a pin 118 carried by the blower head. The other arm 119 of the bell crank lever extends downwardly in position to be engaged by the cam 120 which is fixed to the side of the gear 30B. A spring 121 is connected at its one end to a lug 122 carried by the blower head and is connected :at its other end to an arm 123 fixed to the bell crank lever to normally hold this lever in the position shown in Figure 6 of the drawings.

It will benoted that the arrangement of the bell crank lever is such that when the gear and cam are rotated in a clockwise direction, as viewed in Figure 6 of the drawings, the bell crank lever will be actuated to open the valve 107. When, however, the cam is rotated in a counter-clockwise direction, the bell crank lever will be swung about its pivot against the tension of the spring 121 but will not actuate the valve 107. Thus, this valve will be actuated anduid under pressure will be admitted to the right hand end of cylinder 101 only when the cam 120 is rotated in a counter-clockwise direction.

To provide for exhausting the'chamber 46a, there is a conduit 125 which communicates with this chamber by means of a port 126. At its other end this conduit communicates with chamber 127 Vformed in a valve casing 128. This valve casing is provided with a secondchamber 129 which is open to the atmosphere by means of a port 130, there being provided a valve'131 held to its seat 132 for controlling communication between the chambers 127 and 129.

The valve 131 is provided with a stem 133 and this stem is located beside the arm 122 of the bell crank lever so that the same is actuated simultaneously with the bell crank lever when the latter is actuated to open the valve 107. It will be noted that the cam 120 is made relatively wide to provide a sufllcient actuating surface to engage both the valve stem and actuati118 lever at the same instant.

From the above it is believed that the operation of this form of the invention will also be apparent. With the blower element in its inner blowing position, that is, the position shown in full lines in Figure 5 of the drawings, if the sheave 34.a is actuated to rotate the gear 30* in a clockwise direction, as viewed in Figure 6 ot the drawings, both valves -107 and 131 will be simultaneously actuated by virtue of engagement o! the cam 120 with the arm 119 and the stem 133. Thus, fluid will be admitted to the right hand end of cylinder 101 so that the blower element will be moved to its outer blowing position while at the same time cleaning iluid will be supplied to the blower element i'or discharge from the nozzles thereof. As long as the blower element and cam 120 are rotated in this direction, cleaning fluid will be periodicalLv supplied to the blower element and the latter will remain in its outer blowing position. It, now, the sheave wheel is reversely rotated to rotate the blower element in a clockwise direction, the bell crank lever will be actuated so that its arm 116 will be moved away from the stem 115. Thus, the valve 107 will not be opened. The valve 131, however, will be opened by virtue of engagement of the cam with the stem 133 and cleaning fluid under pressure will be supplied to the blower element. This cleaning iluid under pressure acting on the closed distal end of the blower element will cause the blower element to be moved inwardly to its inner blowing position, and it will be obvious that as long as the blower element is rotated in this direction it will remain in its inner blowing position, while cleaning fluid will be periodically supplied to it. It will be apparent that while the valves 107 and 131 have been shown as being so positioned relative to each other as to be simultaneously actuated by the cam 120, these valves may be so positioned relative to each other that either one or the other may be actuated in advance of the other. In any event, however, a single actuating member will be adapted to eiect both a rotating and traversing movement of the blower element so that the latter may be moved to a desired blowing position and then rotated in this position by theactuation of a single actuating member.

From the above it will be apparent that the invention provides a blower element which is mounted for rotation and for shuttling movement to a plurality of spaced blowing positions. The construction may be such that the blower element may be moved from one blowing position to another without discharging cleaning uid during this traversing movement and there is provided but a single actuating member or mechanism which is adapted for effecting either a shuttling or rotativemovement of the blower element. In each blowing position the blower element may be rotated any number of times to direct the jets of cleaning fluid adjacent the portions of the boiler to be cleaned and in each case the cleaning fluid may be supplied to the blower element in dependence upon the rotation thereof so that the cleaning iluid will only be discharged through a predetermined arc of rotation of the blower element.

While the invention has been described as being incorporated in devices for cleaning boilers, it will be apparent that theinvention may be incorporated in devices for cleaning similar types of apparatus. It is to be therefore-understood that the term "boiler wherever used throughout the specification and claims is to be construed as meaning a iluid heater or heat transfer apparatus of any charactenswhile the term boiler cleaner is to be construed as meaning a cleaner for any such type of apparatus.

While several embodiments of the inventive idea have been described with some detail, it will be apparent that many changes in the construction may be made without departing from the inventive principles disclosed. The right is therefore reserved to make such changes in the details of construction and arrangement of parts as will fall within the purview ot the attached claims.

What we claim as our invention is:

1. In combination, a blower element mounted for rotation and for traversing movement to a plurality of spaced blowing positions, a valve for controlling the ow of cleaning fluid to said blower element, a second valve for controlling a means to move said blower element from one of said blowing positions to another, and means operable upon a rotation of said blower element to actuate both of said valves.

2. In a boiler cleaner, a blower element mounted for rotation and for traversing movement to a pair of spaced blowing positions, a valve for controlling the flow of cleaning ud to said blower element, means including a second valve for effecting the traversing movement of said blower element from one of. said blowing positions to the other, and means operable upon a rotation of said blower element in one direction to eect an actuation of both of said valves and upon rotation of the blower element in the other direction to eiect an actuation of one only of said valves.

3. In a boiler cleaner, a blower element mounted for rotation and for traversing movement to a pair of spaced blowing positions, a valve for controlling the ow of cleaning fluid to said blower element, means including an auxiliary valve for controlling the actuation of said cleaning iluid supply valve, means including a third valve for controlling the traversing movement of said blower element, and means operable upon rotation of said blower element for eecting an actuation of said auxiliary valve and saidvthird valve.

4. In a boiler cleaner, a blower element mounted for rotation and for traversing movement to a pair of spaced blowing positions, means operable to control the discharge of cleaning iluid from said element in both of said positions, piston actuated means for eiecting a traversing movement of said blower element from one of said blowing positions to the other, and means operable upon a rotation of said blower element in one direction to effect an actuation of said piston actuated means.

5. In a boiler cleaner, a blower element mounted for rotation and for longitudinal movement to a pair of spaced blowing positions, a pair of pistons connected to said blower element for longitudinally moving the same, a valve for controlling the ilow of cleaning fluid to the blower element, a second valve for controlling the ilow of a iluid under pressure to said pistons, and

means operable upon a rotation of said blower element in one direction to effect an actuation of both of said valves.

6. In a boiler cleaner, a blower element mounted for rotation and for traversing movement to a pair ofspaced blowing positions, means including a valve for effecting a movement of said blower element from one of said blowing positions to the other, means including a second valve for controlling the ilow of cleaning fluid to said blower element, a cam fixed for rotation with said blower element, a shaft arranged to be rocked by said cam, and a valve actuating member carried by said shaft and arranged between said valves, said actuating member being adapted upon rocking of said shaft in one direction to actuate both of said valves and upon rocking of said shaft in the other direction to actuate one only of said valves.

7. In a boiler cleaner, a blower element mounted for rotation and for traversing movement to inner and outer blowing positions, a valve for controlling the flow of. cleaning fluid to said blower element, said blower element having an open end to receive the cleaning fluid and being closed at its other end, the closed end being subjected to the pressure of the cleaning fluid in the blower element and said blower element being normally freely movable to its inner blowing position whereby when cleaning fluid is supplied to the blower element the latter will be moved by v the pressure of the cleaning fluid to its inner blowing position, means including a piston connected to said blower element for moving the same to its outer blowing position against the pressure of the cleaning fluid, a second valve for controlling the flow of fluid under pressure to said piston, and means operable upon rotation of said blower element in one direction to actuate only the cleaning iluid supply valve and upon rotation of the blower element in the other direction to actuate both the cleaning fluid supply valve and the Valve which controls the ilow of fluid under pressure to said piston.

8. In a boiler cleaner, a blower element mounted for rotation and for traversing movement to spaced blowing positions, means operable to control the discharge of cleaning fluid from said element in both of said positions, means including an annular piston surrounding said blower element for moving the same from one of said blowing positions to the other, and means operable upon rotation of said blower element in one direction to effect a supply of a fluid under pressure to said piston.

9. In a boiler cleaner, a blower element mounted for rotation and for traversing movement td inner and outer blowing positions, a valve for controlling the flow of cleaning fluid under pressure to said blower element, means normally operable upon the supply of cleaning fluid to said blower element to move the said blower element .to its inner blowing position, a piston for moving the blower element to its outer blowing posi.- tion, and means operable upon rotation of said blower element in one direction to effect a supply of fluid under pressure to said piston and an actuation of sai-d'valve.

10. In a fluid heater cleaner, a blower element adapted to discharge cleaning fluid adjacent parts of a fluid heater to be cleaned, fluid pressure actuated means for moving the blower element to each of a plurality of spaced blowing positions and for temporarily holding the blower element in each of sai-d blowing positions, and a valve operable to control the discharge of cleaning fluid 'from said element at each of said temporarily flxed positions. y

11. In a fluid heater cleaner, a blower element adapted to discharge cleaning fluid adjacent parts of a iluid heater to be cleaned, means for supplying cleaning fluid to the blower element, means actuated by the pressure of the cleaning fluid for moving the blower element to each of a plurality of spaced blowing positions and for holding the blower element temporarily in each of said blowing positions, and a valve operable to control the discharge of cleaning fluid from said element at each of said temporarily fixed positions.

12. In a fluid heater cleaner, a blower element mounted for rotation and for traversing movement to a plurality of spaced blowing positions, a source of cleaning fluid supply for said element, means operable to control the discharge of cleaning fluid from said element in each of said spaced blowing positions and fluid pressure actuated means for moving said blower element to each of said spaced blowing positions.

13. In a fluid heater cleaner, a blower element mounted for rotation and for traversing movement to a plurality of spaced blowing positions, a source of cleaning fluid supply for said element, means operable to control the discharge of cleaning fluid from said element in each of said spaced blowing positions, fluid pressure actuated means for effecting a traversing movement of said blower element to one of said blowing positions, and means operating upon a rotation of said blower element in one direction to effect an actuation of said fluid pressure actuated means.

CURTISAL. HOWSE.

WILLIS P. THOMAS. 

